Brno’s Bus Fleet Faces Delay Due to Final Batch of New Fuel-Efficient Buses

The Brno Public Transport Company (DPMB) is awaiting the delivery of 37 diesel buses, which will serve as the final purchase of internal combustion engine vehicles for the fleet. According to reporting from Zdopravy.cz on June 21, 2026, European Union directives now prohibit the operator from acquiring additional diesel-powered buses following this final batch.

This procurement marks a definitive shift in how the city of Brno manages its urban transit hardware. The transition is driven by mandatory emission targets that force public transport authorities to replace traditional diesel engines with zero-emission or low-emission alternatives.

Why can DPMB no longer buy diesel buses?

The restriction stems from the EU Clean Vehicles Directive, which mandates that a specific percentage of new vehicles purchased by public authorities must be “clean.” According to the directive, clean vehicles include those with zero or significantly low emissions, such as battery-electric, hydrogen-fuel cell, or compressed natural gas (CNG) engines.

The directive operates on a quota system that tightens over time. For a transit operator like DPMB, this means the window for purchasing traditional diesel vehicles has closed. The 37 buses currently expected are the last units allowed under the current regulatory framework before the operator must switch exclusively to cleaner technologies.

Failure to comply with these procurement quotas can result in regulatory penalties or the loss of EU funding for infrastructure projects. By capping diesel acquisitions, the EU aims to reduce nitrogen oxides (NOx) and particulate matter in densely populated urban centers.

How does this compare to DPMB’s current fleet technology?

Brno has historically relied on a mix of diesel and CNG vehicles. The technical shift away from diesel is not a sudden jump to electricity, but a staged transition. CNG buses serve as a bridge technology, offering lower particulate emissions than diesel while avoiding the immediate infrastructure costs of a fully electric fleet.

The technical differences between the outgoing diesel units and the incoming cleaner alternatives include:

• Emission Profiles: Diesel engines produce higher levels of soot and NOx, whereas CNG engines significantly reduce these pollutants, meeting stricter Euro VI standards more effectively.
• Fueling Infrastructure: Diesel requires standard tanks, while CNG requires high-pressure filling stations capable of handling gas at approximately 200 bar.
• Energy Density: Diesel provides higher range and torque for hilly terrain, a factor that often influenced the decision to maintain a diesel presence in the fleet until the legal deadline.

While the 37 diesel buses provide a short-term solution for capacity, they represent a legacy technology. According to the fleet strategy outlined by the operator, future investments will prioritize vehicles that align with the “Fit for 55” package, an EU plan to reduce net greenhouse gas emissions by at least 55% by 2030.

What happens to Brno’s transit capacity after this batch?

The arrival of these 37 buses prevents an immediate capacity gap, but it creates a hard deadline for the city’s infrastructure planning. DPMB must now scale its charging and refueling networks to support a fleet that cannot be supplemented by diesel.

This shift requires significant capital investment in depot electrification. Battery-electric buses require high-kilowatt charging stations and upgraded grid connections to ensure that multiple vehicles can charge overnight without destabilizing the local power supply.

The operational risk involves the “range anxiety” associated with early-generation electric buses. If the transition happens faster than the infrastructure can support, the operator may face service disruptions on longer routes where diesel buses previously excelled.

DPMB is currently balancing these risks by integrating CNG as a primary alternative. This allows the operator to maintain reliability across the city’s diverse topography while adhering to the EU’s legal ban on new diesel procurement.

According to Zdopravy.cz, the focus now shifts to the procurement of zero-emission vehicles to replace the aging diesel units that will eventually be retired from the fleet.